Answer:

passerby

Answer	Crossword Clue
PASSERBY	Witness, maybe
PASSERBY	Witness, perhaps
PASSERBY	Window shopper

PASSERBY	Man on the street.
PASSERBY	Sidewalk user
PASSERBY	Man in the street
PASSERBY	Accident witness, often
PASSERBY	Random witness
PASSERBY	Witness by chance
PASSERBY	Onlooker

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.